Mechanical heating apparatus



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s.:J. LINN. v MECHANICAL HEATING APPARATUS. No. 257,729.. Patented May 9, 1882..

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' UNITED- T PATENT ()rrrcn v SYLVESTER J".'LINN, OF' MONDAMIN, ASSlGNOR 0F ONE- HALF TO S. W.

HOLDEN, OF MAGNOLIA, IOWA.

M ECHANIC'AL HEATING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 257,729, dated May 9, 1882.

Application filed February .10, 1882. (No model.)

To all whom it may concern: Be it known that I, SYLVESTER J. L1NN,.of Mondamin, in the county of Harrison and I State of Iowa, have invented certain new and useful Improvements in Mechanical Heating Apparatuses; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use it; reference being had to the accompanying drawings, which form part of this specification. p

My invention relates to an improvement in mechanical heating apparatus which is intended both for heating and cookingpurposes and it consists in the combination of a suitable motor and a series of stationary and revolving plates which are in contact with each other, and which are heated by the frictional contact of the moving plates as they revolve, as will be more fully described hereinafter.

The object of my invention is to produce an apparatus which will generate heat entirely by mechanical friction, and in SUlfiGlGllt quantities to be used for heating a room, for cooking, or keeping food warm after it has been cooked, and thus dispense with the use of fire entirely.

Figure 1 is a side elevation of my invention, partly in section. Fig. 2 is an inverted view of the same with the bottom plate removed. Figs. 3 and 4 are plan views of thestationary and revolving disks. Fig. 5 is an enlarged View of the clamping device or frame and its pulley.

A represents a suitable frame, made of light iron or any other suitable material, and which will be raised a suitable distance above the floor by the legs B. This frame will preferably be made of a circular form, though this form is not absolutely necessary. The upper portion of this frame is formed into a chamber, 0, into which articles are placed, either to be cooked or kept warm, and all the space below this chamber is adapted for the disks by which the heat is generated. In the sides of the frame A will be any suitable number of doors, so as to give access to the cooking-chamber or to the lower part of the frame, so as to oil the different parts and to remove the finely-re Euced metal which is worn from the plates by used for this purpose, and need not bemore fully described" here. The small pulley G in the top of the frame, and over which the rope or chain connected to the weight passes, is journaled in a frame, the sides of which are made movable by means of a screw, H. The

outer end of this screw is cranked, as shown,

and extends through the sides of the frame, and by turning this screw the frame can be made to clasp the sides of the pulley with sufficient force to regulate the speed at which the weight shall run down. The weight may consist of a suitable box orpail, which may be filled with gravel, stone, or other heavy substance, and when less power is required some of the weight may be removed, and when a greater power is needed the weight may be increased. The last pinionof this series of wheels is secured to the shaft J, which has a beveled whee], K, upon its inner end. This wheel K meshes with a similar wheel, L, on a verticalshaft, N, which extends up through the center of the frame, as shown. Inside the frame isa series of stationary plates or disks, V, which have a suitably-sized hole made through their .centers for the shaft to pass through, and which are held in position by the little projections O, which extend out from their edges, and which catch in suitable recesses made in the side of the frame, or in the posts which are placed inside of the frame. The revolving disks Q are of less diameter than the stationary ones, and have small angular openings made through their centers, so-as to attach them directly to the shaft, whereby when the shaft is made to revolve the disk Q is made to revolve at the same, time. These disks being placed between the, stationary disks Q, which are always in contact with thcm,the friction between the plates generates. a heat, which may be used either for heating the compartment by allowing a current of air to pass up around the cooking-chamber above.

This invention, while 1t is intended more esplates, or by closing the frame will heat the loo pecially for prairies and those regions where fuel is scarce, is yet adapted for use in any 10- cality.

Instead of the cog-wheels here shown, frictional contact may be used between the parts, and thus dispense with the noise that is gen'- erally made by the cogs as they revolve.

Having thus described my invention, I elaim- The combination of a frame, A, having a cooking or heating chamber, 0, and a charmpresence of two witnesses.

her in which the frictional plates are, placed, with the operating-shaft N, having ais'eries of plates secured to it, a series of stationary plates, and an operating mechanism that is connected I 5 to the shaft, substantially as shown.

In testimony whereof I affix my signature in SYLVESTER J. LINN. Witnesses:

Z. T. NoYEs, JAMES MIcKEL. 

